Basically - Paul a phony. Early Christian sects rejected his Epistles - he seen as an imposter. Preached gospel of uncircumcision - Gentiles being easier to convert, as Jews require matching to their prophecies. Early Christians believed Jesus but a man whereas Paul made him a God, no doubt to increase the lustre of his ministry. Paul taking up preaching as easy and honorable means of subsistence. Zeal is the gall of a bigot excited by differences of sects - Paul left a model of this sort.